fix: appropriate negative other charges upto 0.1 to rounding adjust…

…ment (#351) (#352)

(cherry picked from commit 5dfa43a)

Co-authored-by: Sagar Vora <sagar@resilient.tech>

india_compliance/gst_india/utils/transaction_data.py

@@ -87,10 +87,17 @@ def update_transaction_tax_details(self):
         for total in ["base_total", "rounding_adjustment", *tax_totals]:
             current_total += self.transaction_details.get(total)
 
-        self.transaction_details.other_charges = self.rounded(
+        other_charges = self.rounded(
             (self.transaction_details.base_grand_total - current_total)
         )
 
+        if 0 < other_charges < -0.1:
+            # other charges cannot be negative
+            # handle cases where user has higher precision than 2
+            self.transaction_details.rounding_adjustment += other_charges
+        else:
+            self.transaction_details.other_charges = other_charges
+
     def validate_mode_of_transport(self, throw=True):
         def _throw(error):
             if throw: